Binder insert



FIG. 1 is a front view of the binder insert;

FIG. 2 is a rear view of the binder insert of FIG. 1;

FIG. 3 is a right side view of the binder insert of FIG. 1;

FIG. 4 is a left side view of the binder insert of FIG. 1; and,

FIG. 5 is a top view of the binder insert of FIG. 1. 

The ornamental design for a binder insert, as shown and described. 